Rough surging idle when cold recently installed 100 horse injectors,fass 165 lift pump,s&b air intake,xdp exhaust manifold,5" mbrp exhaust, quadzilla tuner runs great under load just bouncing at idle when cold and when coasting run it for awhile and it smoothes out driving me crazy. Oh and I did replace apps sensor before I did any of the other upgrades,and reset after upgrades wonduring what else I can check or if anyone else has experienced this thanks for any help.